981
FNCA52 TJSJ 210840
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
440 AM AST SUN DEC 21 2025
DISCUSSION
OCCASIONAL PASSING SHOWERS OVER WINDWARD AREAS WILL PREVAIL
TODAY. ADDITIONAL SHOWERS WILL ALSO BE POSSIBLE THIS AFTERNOON
OVER INTERIOR TO WSW PUERTO RICO. ENE WINDS WILL BE AT 15 TO 20
MPH WITH HIGHER GUSTS ARE ACROSS COASTAL SECTORS. REGARDLESS, THE
FIRE DANGER WILL REMAIN LOW TODAY. BUT WE ENCOURAGE PEOPLE TO
CONTINUE TO MONITOR THE FORECAST TO BE UPDATES WITH ANY CHANGES
IN THE FORECAST.
PRZ014-220845-
SOUTHEAST COASTAL PLAINS-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 88 (+3) 69 (-1) 88
RH % (24H TREND) 47 (-9) 92 (+4) 49
WIND 20FT/EARLY(MPH) E 17 G22 NE 12 E 17 G22
WIND 20FT/LATE(MPH) E 17 G22 NE 12 E 17 G22
MIXING HGT(FT-AGL/MSL)4890 5420
TRANSPORT WND (MPH) E 16 E 12
VENT RATE (KT-FT) 68460 54200
DISPERSION 5 5
DSI 6 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-220845-
SOUTHERN HILLS-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 84 (+4) 66 (-2) 83
RH % (24H TREND) 60 (-9) 98 (+5) 63
WIND 20FT/EARLY(MPH) E 12 NE 12 E 12
WIND 20FT/LATE(MPH) E 12 NE 12 E 12
MIXING HGT(FT-AGL/MSL)4890 5600
TRANSPORT WND (MPH) E 16 E 12
VENT RATE (KT-FT) 68460 56000
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-220845-
NORTH COASTAL PLAINS-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50
TEMP (24H TREND) 86 (+2) 69 (-2) 86
RH % (24H TREND) 62 (-6) 99 (+4) 64
WIND 20FT/EARLY(MPH) E 17 G19 E 17 NE 16
WIND 20FT/LATE(MPH) E 17 G19 E 17 NE 16
MIXING HGT(FT-AGL/MSL)4470 4920
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 71520 68880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-220845-
NORTHERN HILLS-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 40
TEMP (24H TREND) 85 (+2) 67 (-2) 84
RH % (24H TREND) 61 (-7) 99 (+2) 63
WIND 20FT/EARLY(MPH) E 14 E 13 NE 13
WIND 20FT/LATE(MPH) E 14 E 13 NE 13
MIXING HGT(FT-AGL/MSL)4450 5240
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 66750 68120
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-220845-
WEST COAST-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 60
TEMP (24H TREND) 88 (+2) 67 (-2) 87
RH % (24H TREND) 59 (-6) 98 (+2) 61
WIND 20FT/EARLY(MPH) E 14 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 16 E 17
MIXING HGT(FT-AGL/MSL)4370 4620
TRANSPORT WND (MPH) E 14 E 12
VENT RATE (KT-FT) 52440 46200
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-220845-
EASTERN INTERIOR-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 84 (+2) 68 (-2) 84
RH % (24H TREND) 66 (-5) 99 (+3) 66
WIND 20FT/EARLY(MPH) E 12 E 12 NE 11
WIND 20FT/LATE(MPH) E 12 E 12 NE 11
MIXING HGT(FT-AGL/MSL)4790 5640
TRANSPORT WND (MPH) E 16 NE 13
VENT RATE (KT-FT) 67060 62040
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-220845-
LUQUILLO MOUNTAIN RANGE-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50
TEMP (24H TREND) 80 (+3) 66 (-2) 79
RH % (24H TREND) 71 (-4) 100 (+2) 72
WIND 20FT/EARLY(MPH) E 11 E 10 NE 9
WIND 20FT/LATE(MPH) E 11 E 10 NE 9
MIXING HGT(FT-AGL/MSL)3980 4480
TRANSPORT WND (MPH) E 17 NE 13
VENT RATE (KT-FT) 59700 49280
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-220845-
CENTRAL MOUNTAIN RANGE-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 60
TEMP (24H TREND) 84 (+5) 64 (-2) 83
RH % (24H TREND) 61 (-9) 99 (+4) 64
WIND 20FT/EARLY(MPH) E 11 E 11 NE 12
WIND 20FT/LATE(MPH) E 11 E 11 NE 12
MIXING HGT(FT-AGL/MSL)4670 5830
TRANSPORT WND (MPH) E 15 E 12
VENT RATE (KT-FT) 60710 58300
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-220845-
CAYEY MOUNTAIN RANGE-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 80 (+3) 66 (-1) 80
RH % (24H TREND) 70 (-5) 100 (+2) 70
WIND 20FT/EARLY(MPH) E 11 NE 10 E 10
WIND 20FT/LATE(MPH) E 11 NE 10 E 10
MIXING HGT(FT-AGL/MSL)4610 5270
TRANSPORT WND (MPH) E 16 NE 14
VENT RATE (KT-FT) 64540 63240
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-220845-
VIEQUES-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 85 (0) 71 (-3) 85
RH % (24H TREND) 62 (0) 96 (+5) 60
WIND 20FT/EARLY(MPH) E 16 G19 E 16 G20 E 12
WIND 20FT/LATE(MPH) E 16 G19 E 16 G20 E 12
MIXING HGT(FT-AGL/MSL)3510 3540
TRANSPORT WND (MPH) E 21 NE 14
VENT RATE (KT-FT) 63180 42480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-220845-
CULEBRA-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 87 (+1) 73 (-2) 86
RH % (24H TREND) 62 (-1) 94 (+5) 59
WIND 20FT/EARLY(MPH) E 16 G20 E 16 G20 E 12
WIND 20FT/LATE(MPH) E 16 G20 E 16 G20 E 12
MIXING HGT(FT-AGL/MSL)3580 3520
TRANSPORT WND (MPH) E 21 E 15
VENT RATE (KT-FT) 64440 45760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-220845-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 60
TEMP (24H TREND) 89 (+3) 68 (-2) 88
RH % (24H TREND) 47 (-10) 93 (+7) 49
WIND 20FT/EARLY(MPH) E 18 G23 E 12 E 18
WIND 20FT/LATE(MPH) E 18 G23 E 12 E 18
MIXING HGT(FT-AGL/MSL)5160 5170
TRANSPORT WND (MPH) E 14 E 9
VENT RATE (KT-FT) 61920 41360
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-220845-
SAINT THOMAS AND SAINT JOHN-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 86 (+1) 72 (-3) 86
RH % (24H TREND) 64 (0) 97 (+7) 60
WIND 20FT/EARLY(MPH) E 17 G21 E 16 G20 E 12
WIND 20FT/LATE(MPH) E 17 G21 E 16 G20 E 12
MIXING HGT(FT-AGL/MSL)3570 3510
TRANSPORT WND (MPH) E 22 E 16
VENT RATE (KT-FT) 67830 49140
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-220845-
ST CROIX-
440 AM AST SUN DEC 21 2025
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30
TEMP (24H TREND) 85 (0) 73 (-1) 85
RH % (24H TREND) 64 (+2) 92 (0) 60
WIND 20FT/EARLY(MPH) E 16 G19 E 16 G18 E 12
WIND 20FT/LATE(MPH) E 16 G19 E 16 G18 E 12
MIXING HGT(FT-AGL/MSL)4000 3800
TRANSPORT WND (MPH) E 21 E 15
VENT RATE (KT-FT) 72000 49400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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